Table 2 Biological and immunological thyroid status.

From: Prevalence and impact of thyroid dysfunction in patients with rheumatoid arthritis

Biological data:

RA group

Control group

p-value

Reference values

FT4 (pmol/L)

15.01 [13.48;16.71]

15.4 [13.87;16.66]

0.362

12–22

TSH (mUI/L)

1.42 [0.91;2.26]

1,79 [1.25;2.26]

0.152

0.27–4.2

TPOAb (UI/mL)

12.80 [8.98–16.43]

6.81 [5.19–9.17]

 < 0.01

0–34

TgAb (UI/mL)

16.49 [13.32–21.31]

10.36 [10–12.53]

 < 0.01

0–115

TRAb (UI/L)

0.9 [0.8–2.7]

0.83 [0.8–2.01]

0.02

 < 1.75

Positive TPOAb (n (%))

6 (10.3)

5 (9)

0.751

 

Positive TgAb (n (%))

3 (5.2)

3 (5)

1.000

 

Positive TRAb (n (%))

2 (3.4)

1 (2)

0.500

 

Thyroid status

 Thyroid dysfunction (n (%))

11 (19)

3 (5)

 < 0.01

 

 Hypothyroidism (n (%)) *

10 (17)

3 (5)

0.013

 

 Hyperthyroidism (n (%))

1 (2)

0 (0)

1.000

 

 Autoimmune thyroid disease (n (%))

9 (15.5)

7 (12)

0.590

 
  1. FT4, Free thyroxine; TSH, Thyroid-stimulating hormone; TPOAb, Anti-thyroid peroxidase antibodies; TgAb, Anti-thyroglobulin antibodies; TRAb, Anti-TSH receptor antibodies; n, Number.*Hypothyroidism includes overt hypothyroidism and subclinical hypothyroidism.
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